iris
The iris is the diaphragm of the optical apparatus of the eye. It has an opening in the middle that represents the pupil. The amount of pigment (dye) stored in the iris determines the color of the eyes. By varying the size of the pupil, the
Category : Anatomy-Lexicon
Blind spot
Dr Gumpert. de, your anatomical information portal. A lot of helpful information on the subject of blind spots is described in an understandable way.
adrenaline
These stress hormones adrenaline and noradrenaline are produced in the adrenal medulla and in nerve cells. In stressful situations, these hormones are able to activate the cardiovascular system by increasing the heart rate and blood pressure
blood
The medical information portal. Here you will find information on the subject of blood that is understandable for laymen. Laboratory values.
Retina of the eye
The retina consists of several layers. It is responsible for color and brightness vision and ultimately forms the optic nerve, which forwards the impulses to the brain. For the different colors and light intensities
Tear fluid
The tear fluid is produced by the lacrimal glands and flows off through two dots in the inner corner of the eye. It consists mainly of water. Other important components are table salt, proteins, sugar and inorganic substances. It serves that
How does seeing work?
the information portal for ophthalmology. How seeing works clearly explained.
Tear ducts
The tear system is made up of a tear-producing and a tear-draining part. The moistening of the surface of the eye is of great importance for the vision and function of our eyes. It also has the cleaning function for protection
The optic nerve
The optic nerve (nervus opticus) is one of the cranial nerves and transmits the images created in the eye to the brain. In the context of a green starr (increased intraocular pressure), the nerve is often damaged. Other diseases include the optic nerve
Ear canal
The ear canal consists of an inner and an outer part. The ear canal extends from the auricle to the eardrum and is supposed to guide and amplify the sound waves. Diseases such as a boil of the ear canal are often caused by that
The outer ear
The earlobe is very well supplied with blood. It is used in acupuncture or reflexology to activate the energy metabolism. Inflammation and pain are not uncommon, especially with pierced ears, and are often caused by intolerance
thyroid
The thyroid is one of the body's so-called endocrine organs, whose main job is to produce hormones that are released into the blood. The thyroid is made up of two lobes, one on both sides of the windpipe and the one above it
nose
The nose is one of the individual characteristics of every person. Depending on culture, age and gender, the nose can be long or snub-nosed, narrow or wide, petite or hook-shaped. All noses have nostrils, nostrils and a nasal septum
eardrum
The eardrum forms the boundary between the external auditory canal and the middle ear. As part of the physical exam, the doctor inspects the eardrum and looks for injuries or signs of inflammation. As part of an otitis media it is
bone
The human skeleton consists of over 200 bones that provide stability and enable upright walking. The arms and legs contain tubular bones that are long and rod-shaped, while the pelvis, sternum and skull are flat
The inner ear
The inner ear is a complex structure with the help of which we can orientate ourselves in space. Sound perception plays an extremely important role in our social coexistence. Our equilibrium organ, which measures accelerations, is also
Middle ear
The middle ear is an air-filled space that contains the ossicles. They conduct the sound, which finally comes from the external auditory canal via the eardrum to the inner ear. Hearing is severely impaired in the case of otitis media
Nasal cavity
The nasal cavity is one of the upper air-conducting airways and is formed by bony and cartilaginous structures. In addition to the respiratory function, it is relevant for the antibacterial defense, the olfactory function and language formation. In the nasal cavity becomes
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Frontal sinus
The frontal sinus belongs to the paranasal sinuses with the maxillary sinus, the sphenoid sinus and the ethmoid cells. It represents an air-filled cavity in the bone that forms the forehead and, like the other parts of the paranasal sinuses, can also develop
Nasal mucosa
The nasal mucosa is a thin layer that lines our nasal cavities from the inside and consists of cilia. The main functions of our nasal mucosa are smelling and breathing as well as the preparation of the air we breathe through purification, adults
